Botanical hydrosol (conifer)
THUJA ORIENTALIS LEAF WATER
Safety score · 0–100
Fine
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
A water distilled from oriental arborvitae leaves, popular in Korean and Japanese scalp tonics. It carries only traces of the plant's thujone, so it sits in the cautious-yellow tier rather than green.
Skin benefits
- Hydrosol from oriental arborvitae, traditionally used in East Asian skincare for scalp and skin soothing
- Contains flavonoids and trace volatiles with mild antioxidant activity
- Water-based, low essential oil load relative to the oil itself
- Often paired with hair-care formulas marketed for thinning hair
Known concerns
- Thuja essential oils contain thujone, a neurotoxic ketone; hydrosols carry only traces but the concern persists
- IFRA restricts use of thuja essential oils due to thujone content
- Possible contact dermatitis in sensitive individuals
- Clinical evidence for cosmetic benefits is limited to traditional use and small studies
References
EU CosIng database
European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.
Same plant / compound family
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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve, so always read the physical product label and consult a healthcare professional for personal concerns.